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I'm trying to update formats on MikTex 2.9 and receive the following error message:

miktex-makefmt.exe: Invalid control sequence. initexmf.EXE: The operation failed for some reason. initexmf.EXE: Data: C:\Program Files (x86)\MiKTeX 2.9\miktex\bin\miktex-makefmt.exe

Originally my problem is that when I try to compile I receive the message,

pdflatex.exe: Invalid control sequence.

I figured updating formats would fix this?

  • Close all miktex related applications (YAP etc). Then open miktex-settings (admin or user) again, go to the format tab, select pdflatex and click on build. If you get an error try to capture as much informations as possible. – Ulrike Fischer Jul 2 '15 at 8:35
  • Thanks for the suggestion. I tried to build pdflatex in the formats tab, but receive the following error message: – Angel Jul 13 '15 at 21:17
  • miktex-makefmt.exe: Invalid control sequence. initexmf.EXE: The operation failed for some reason. initexmf.EXE: Data: C:\Program Files (x86)\MiKTeX 2.9\miktex\bin\miktex-makefmt.exe – Angel Jul 13 '15 at 21:17

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